Countertop Combi Ovens in 2026: 5 Picks by Cavity Size
The best countertop combi oven in 2026, ranked by usable cavity liters and water tank size — plus when a steam-convection oven beats a second wall oven.
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Combi ovens — steam plus convection in one cavity — used to be a $4,000 built-in proposition. In 2026 you can get most of the capability on a countertop, and a growing number of people are buying one instead of a second wall oven. That's a real decision with real trade-offs, and cavity volume is where it usually gets decided.
We compared the current crop on usable interior space, water tank size and refill frequency, steam control (variable vs. on/off vs. superheated), and what owners report after a year of use. Below, picks are ordered roughly by how much food you can actually fit.
What "combi" actually means on a countertop
A true combi oven injects steam into a convection cavity and lets you set humidity independently of temperature. That's the Anova Precision Oven 2.0's whole pitch: dial steam anywhere from 0 to 100 percent, run a wet-bulb target, and you can proof bread, roast a chicken without brining it, or hold a steak at a precise core temperature.
Best overall · Anova Precision Oven 2.0 — Check price on Amazon →
Three other things get sold as "steam ovens" and aren't quite the same:
- Steam-assist convection (Cuisinart CSO-300N1): steam is on or off, boosting a bake or steaming vegetables. Useful, less surgical.
- Superheated steam (Sharp SSC0586DS): water is flashed past boiling and used as the primary heat carrier. Brilliant at reviving leftovers and crisping skin; not a general-purpose baking oven.
- Convection-only countertop ovens (Breville Joule Oven Air Fryer Pro, Breville Smart Oven Air Fryer Pro): no water tank at all. We've included two because, honestly, a lot of people shopping for combi steam want capacity and speed more than humidity control.
Best all-rounder (no steam tank) · Breville Joule Oven Air Fryer Pro — Check price on Amazon →
The cavity-size reality check
Manufacturers quote cubic feet or liters, but usable space is what matters: rack clearance, whether a half-sheet pan fits, and how much the steam hardware eats into the box.
A nominal 1 cu ft (roughly 28 L) countertop oven will take a 13x9 pan or a quarter-sheet comfortably, and most will roast a 4–5 lb chicken. Nothing on a counter is going to handle a 20 lb Thanksgiving turkey, and nothing here replaces a full 5 cu ft wall oven for volume. What a combi does replace is the second oven you were going to buy for side dishes, reheating and low-temperature work.
Comparison table
| Model | Approx. cavity | Steam type | Water source | Best for |
|---|---|---|---|---|
| Anova Precision Oven 2.0 | ~1.1 cu ft / ~31 L | Variable 0–100%, sous vide mode | Removable tank | Precision cooking, bread, proteins |
| Breville Joule Oven Air Fryer Pro | ~1 cu ft / ~28 L | None (convection + air fry) | n/a | Everyday do-everything oven |
| Breville Smart Oven Air Fryer Pro BOV900BSS | ~1 cu ft / ~28 L | None (convection + air fry) | n/a | Max capacity per dollar |
| Sharp SSC0586DS | ~0.9 cu ft (large cavity) | Superheated steam | Removable tank | Reheating, crisping, low-oil roasting |
| Cuisinart CSO-300N1 | ~0.6 cu ft | Steam-assist on/off | Removable tank | Small kitchens, steaming + baking |
Figures are manufacturer-stated nominal capacities; check your exact pan sizes before committing.
The picks
Anova Precision Oven 2.0 — best overall combi
This is still the only countertop oven that gives home cooks genuine humidity control, and the 2.0 revision addressed the complaints that dogged the original (owners of the first generation reported reliability problems over time, which is worth knowing if you're shopping used). The cavity is the largest here at roughly 1.1 cu ft, the removable tank sits on the side, and the sous vide mode — which uses a wet-bulb target rather than a water bath — genuinely replaces a circulator for most people.
Where it shines: 100% steam at 185°F for custards and eggs, 25% steam for roast chicken, full steam injection for the first 10 minutes of a sourdough bake. Where it doesn't: it's expensive, it's physically large and deep, and the learning curve is real. If you want to press one button and have dinner happen, this is not your oven.
Tank note: you'll refill during long high-steam cooks. That's normal for every countertop combi — none of them plumb in.
Breville Joule Oven Air Fryer Pro — the versatile alternative
If you've read "combi oven" and what you actually want is one appliance that does everything well, this is the honest recommendation. It has no water tank, so it isn't a combi — but with around 1 cu ft of space, Element iQ heating that shifts power between elements, air fry, dehydrate, proof and app-guided cooking, it's the countertop oven most households will use daily. Independent round-ups in 2026 have consistently ranked it at or near the top of the general countertop oven category.
Buy it if humidity control sounds like a feature you'd use twice. Skip it if you're baking bread seriously or reheating a lot.
Breville Smart Oven Air Fryer Pro BOV900BSS — same footprint, lower price
Essentially the pre-app version of the above: the same generous cavity, 13 functions, and a convection system that has been the benchmark for years. No connectivity, no steam. If budget is the constraint and you mainly want capacity plus reliable convection, this is better value than a small combi.
Sharp SSC0586DS — superheated steam specialist
Sharp's superheated steam approach heats water past 212°F and uses that as the cooking medium. The practical result: pizza slices, fried chicken and roast potatoes come back out of the oven crisp rather than rubbery, and you can roast with very little added fat. It's genuinely excellent at the thing it does.
It's less of a general baking oven — temperature behaviour is different from a standard convection box — and the cavity, while roomy for its class, trails the Breville pair. Think of it as a leftovers machine that also roasts well.
Cuisinart Convection Steam Oven CSO-300N1 — best compact combi
At around 0.6 cu ft, this is the one that fits under a cabinet without rearranging your kitchen. Steam is on/off rather than variable, but combined with convection it does the two jobs most people want from steam: vegetables that stay bright, and bread with a decent crust. The tank pulls out for filling and there's a bake-and-steam combined mode.
Owners consistently mention descaling: hard water will scale the boiler, and the maintenance cycle is not optional. Budget a few minutes a month.
Combi oven or second wall oven?
Buy the countertop combi if:
- You cook for two to four people and need overflow capacity, not banquet capacity.
- You want steam, sous vide or precise low-temperature work your main oven can't do.
- You rent, or you don't want a cabinet renovation.
- You preheat constantly — a small cavity hits temperature far faster than a wall oven.
Buy the second wall oven if:
- You regularly cook for eight-plus or bake multiple sheet pans at once.
- Counter space is already contested. These units are deep (plan on 18–20 inches) and need clearance above and behind.
- You don't want to think about water tanks or descaling.
One more consideration: power. Most of these draw close to the limit of a standard 15-amp North American circuit. Don't run a combi oven and a kettle on the same breaker.
FAQ
Do countertop combi ovens need plumbing? No. Every model here uses a removable water tank. Expect to refill during long, steam-heavy cooks, and use filtered or distilled water if your supply is hard.
Can a countertop combi replace my main oven? For a one or two person household, often yes — but not for holiday cooking or multi-pan baking. Treat it as a capable second oven, not a primary.
How often do they need descaling? Depends entirely on water hardness. With hard water, monthly descaling is realistic; with filtered or distilled water, far less. Skipping it is the most common cause of steam failures reported by owners.
Is the sous vide mode on the Anova as good as a water bath? For most proteins, functionally yes — it holds a precise wet-bulb temperature without bags or a tub. For very long cooks and very thick cuts, a circulator still has an edge on consistency.
Which is best for bread? The Anova Precision Oven 2.0, because you can inject full steam for the opening minutes then drop to dry heat. The Cuisinart does a credible job at a much lower price in a smaller cavity.
Our picks
Anova Culinary Sous Vide Precision Cooker 3.0 (WiFi), 1100 Watts, Stainless Steel
True variable steam (0–100%) plus sous vide mode in a ~1.1 cu ft cavity — the most capable home combi.
Breville BOV950BST Joule Oven Air Fryer Pro, Black Stainless Steel
Huge 1 cu ft cavity, element IQ heating and app control if you want versatility over true combi steam.
Cuisinart Convection Steam Oven CSO-300N1
Real steam-plus-convection with a removable tank in a small 0.6 cu ft footprint.
Sharp Superheated Steam Countertop Oven SSC0586DS
Steam-only heating up to very high temps — excellent for reheating and crisping without drying food out.
Breville BOV900BSS Smart Oven Air Fryer Pro, Brushed Stainless Steel
1 cu ft of usable space, 13 functions and a proven convection system — no tank, no app, lower price.
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